Red box (government)
A TYPE OF DESPATCH BOXES
Ministerial red box; Ministerial box; Document box; Budget box
Red boxes, or sometimes ministerial boxes, are a type of despatch box produced by Barrow Hepburn & Gale or Wickwar & Co and are used by ministers in the British government and the British monarch to carry government documents. Similar in appearance to a briefcase, they are primarily used to hold and transport official ministerial papers.